Downloading HanDBase Plus for iPhone/iPad Add-on Demo Select your Desktop PlatformWindows: Will provide you with a self installing .EXE file (or a .ZIP file) that you will need to run in order to obtain the files for the Desktop and Handheld device.Macintosh: Will provide either a PKG installer that once downloaded you can double click to start the setup or a self-extracting DMG file that should autmatically Mount on your computer and allow you to easily copy files to install the softare.